Comparison Opel Signum (facelift 2005) 1.8i 16V (140 Hp) & Mercedes-Benz S-class Long (W221, facelift 2009) S 450 V8 (340 Hp) G-TRONIC
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| Brand: | Opel | Mercedes-Benz |
| Model: | Signum | S-class |
| Generation: | Signum (facelift 2005) | S-class Long (W221, facelift 2009) |
| Engine / modification: | 1.8i 16V (140 Hp) | S 450 V8 (340 Hp) G-TRONIC |
| Production start: | 2006 year | 2009 year |
| Production end: | 2008 year | 2010 year |
| Coupe type: | Hatchback | Sedan |
| Num. of Doors: | 5 | 4 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 10.4 l/100 km | 16.0-16.3 l/100 km |
| Fuel consumption / economy - extra urban: | 6.1 l/100 km | 7.8-8.0 l/100 km |
| Fuel consumption / economy - combined: | 10.7-11 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | |
| Fuel tank volume: | 60 l | 90 l |
| CO2 emissions: | 251-257 g/km | |
| Power: | 140 hp | 340 hp |
| Max power in: | 6300 rpm. | 6000 rpm. |
| Maximum speed: | 207 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 11.3 sec | 5.9 sec |
| Torque: | 175 Nm/3800 rpm. | 460 Nm @ 2700-5000 rpm. |
| Engine position: | Front, transverse | Front, longitudinal |
| Engine displacement: | 1796 cm3 | 4663 cm3 |
| Fuel System: | Multi-point injection | Multi-point injection |
| Position of cylinders: | Inline | V engine |
| Valvetrain: | DOHC | |
| Number of cylinders: | 4 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.5 | 10.5 |
| Piston Stroke: | 88.2 mm | |
| Cylinder Bore: | 80.5 mm | |
| Wheel Drive: | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 7G-TRONIC | |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4651 mm | 5226 mm |
| Width: | 1798 mm | 1871 mm |
| Width including mirrors: | 2120 mm | |
| Height: | 1466 mm | 1479 mm |
| Wheelbase: | 2830 mm | 3165 mm |
| Front track: | 1536 mm | 1600 mm |
| Rear (Back) track: | 1525 mm | 1606 mm |
| Front overhang: | 888 mm | |
| Rear overhang: | 1173 mm | |
| Minimum volume of Luggage (trunk): | 365 l | 560 l |
| Maximum amount of Luggage (trunk): | 1410 l | |
| Front suspension: | Independent, spring | |
| Rear suspension: | Independent, spring | |
| Max weight: | 2020 kg | 2595 kg |
| Front brakes: | Disc | Disc |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 1425 kg | 1940 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | |
| Minimum turning circle (turning diameter): | 12.2 m | |
| Tire size: | 215/55 R16 | 255/45 R18 |
| Wheel rims size: | R16 | R18 |